It was observed that the producer gas outlet from the
system could be cooled down to desired temperature
(less than 40◦C). Fig. 15 shows the variation of the gas
outlet temperature with cooling water Jow rate. Tar
Fig. 15. Cooling water Jow rate versus gas outlet temperature.
content at the outlet of the spray tower decreased to
5mgNm−3 from its initial content of 54 mgNm−3.
No tar outlet was found in the case where the initial
tar content was 28 mgNm−3. Thus, gas outlet from
the cooler can be safely used for internal combustion
engine applications without any tar problems.